<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        let userName, pwd
        userName = prompt("请输入的用户名")
        pwd = prompt("请输入密码")
        if (userName == "admin" && pwd == "123456") {
            alert("登录成功")
        } else {
            alert("登录失败")
        }
    </script>
</body>

</html>